Hello guys!
I have installed UnrealIRCd on my machine.
I am having a Router and also DDNS (From my ISP Provider)
I am having Anope IRC Services.

Everything is running fine (Server/Services)
The problem is that I want to make my mIRC Server to be available for the Public.
I can connect to my Server from the same machine on which is running using both 127.0.0.1 / Localhost / DDNS, but once I try from anywhere else I see the following:

From what you've suggested, your ircd server is only listening on the localhost port, meaning it can only connect to itself. I would suggest that you edit your configuration file to change it to listen on the LAN IP of your machine, presuming it has a static IP. For example, 192.168.1.10, if that is the IP of your machine.